[Users] failover and presence/IM service

[Daniel-Constantin Mierla]

Hello,

On 06/21/05 13:34, jimmy way wrote:

>Hi all,
>   1st question is does openser support Failover and
>load balance of openser server. That means we can use
>two or more openser server to handle the SIP
>request/response
>
there is a module named "dispatcher" that can be used to distribute the 
traffic. It does static distribution, does not count the load of a server.

> and use hot backup. How to do that
>  
>
There is no exlicit support for hot backup in openser/ser. You have to 
use third-party products to be able to switch between the active and 
backup servers. The two servers can be kept synchronized using 
t_replicate().

>   2nd question is that I find openser support both
>Jabber and SIMPLE.
>
No, it does not support Jabber/XMPP, just SIP and SIMPLE. It includes a 
Jabber-to-SIMPLE gateway which is able to translate from a protocol to 
another. The presence does not work, because presence support in 
openser/ser (pa module) in under heavy development and not released as 
stable. Also, the jabber module (the Jabber-to-SIMPLE gateway) was not 
tested with latest Jabber servers.

I have started long time ago to write a pure SIMPLE-to-XMPP gateway 
which will allow on-the-fly gatewaying, without authentication as it is 
now (the authentication is required so users can provide ICQ/MSN/AIM 
accounts to get from SIMPLE to that IM network via Jaber). If someone 
wants to take over, I can give some help at the beginning.

> It look like Jabber is stable and
>support and many people from open source world, many
>plus GOOGLE.
>
Jabber is also a bit older than SIMPLE and it was designed for instant 
messaging and presence.

> But SIMPLE is still unstable.
>
SIMPLE is just an extension for SIP to enable instant messaging and 
presence, so it carries the design of VoIP.

> I want to
>use Jabber for providing presence/IM service, plus
>file transfer service.(I want to using reSIProcate
>stack from sipfoundry as client's stack) Does openser
>support that all?
>  
>
OpenSER can interwork with any SIP-compliant entity

>And which is better, Jabber or SIMPLE?
>  
>
With VoIP gaining more and more supporters, SIMPLE may be a winning 
card, but I think will take some time to have mature implementations at 
least for presence. As I see things evolving at IETF, the format to 
carry presence information is going to be unified (if not yet) and 
SIP/SIMPLE or XMPP will be carrier protocols. Also, XMPP started to 
develop extensions for VoIP :) ...

Regards,
Daniel

>
>Regards,
>Jimway 
>
>
>		
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